On 1 March 2014, he top scored for the team with five points when CIT suffered a 0-17 to 0-12 defeat by the Waterford Institute of Technology in the Fitzgibbon Cup final.

[2] O'Dwyer joined the Killenaule club at a young age and played in all grades at juvenile and underage levels.

[3] On 30 August 2008, O'Dwyer lined out at right corner-forward when Killenaule faced Ballingarry in the South Tipperary Championship final.

[citation needed] On 2 September 2013, O'Dwyer was selected at centre-forward when Killenaule lined out against Carrick Swans in the South Tipperary Championship final.

[citation needed] Killenaule qualified for a second successive South Tipperary Championship final on 23 August 2014 with Mullinahone providing the opposition.

On 13 July 2008, O'Dwyer came on as a substitute for Paddy Murphy when Tipperary suffered a 0-19 to 0-18 defeat by Cork in the Munster final.

On 28 July 2010, O'Dwyer won a Munster Championship medal after scoring three points in Tipperary's 1-22 to 1-17 defeat of Clare in the final.

[10] On 5 May 2013, O'Dwyer came on as a substitute for Eoin Kelly at full-forward when Tipperary suffered a 2-17 to 0-20 defeat by Kilkenny in the National League final.

[11] On 4 May 2014, O'Dwyer scored 1-03 from left wing-forward when Tipperary suffered a 2-25 to 1-27 defeat by Kilkenny in a second successive National League final.

[17] On 19 June 2016, O'Dwyer received a straight red card after striking Limerick's Richie English in the 14th minute of Tipperary's 3-12 to 1-16 Munster semi-final victory.